.container {
    flex-direction: column; /* 垂直排列 */
    background: linear-gradient(#ebf7fd,#FFFFFF);
}
.button-div{
    flex-direction: row;
    justify-content: space-around;
    margin-top: 120px;
}
.video-block {
    width: 100%;
    aspect-ratio: 1.78; /* 宽高比例 */
    justify-content: center; /* 垂直居中 */
    align-items: center; /* 水平居中*/
}
.top-tool{
    flex-direction: row;
    height: 80px;
    width: 100%;
    align-items: center;
}
.back-icon{
    height: 48px;
    width: 48px;
    object-fit: contain;
    margin-left: 20px;
}
.projection-icon{
    height: 48px;
    width: 48px;
    object-fit: contain;
    margin-left: 560px;
}

video {
    width: 100%;
    height: 100%;
}
.dialog-main {
    width: 98%;
}
.dialog-div {
    flex-direction: column; /* 垂直排列 */
    align-items: center; /* 水平居中 */
}
.inner-txt {
    width: 98%;
    margin-top: 40px;
    flex-direction: column;
    align-items: center;
    justify-content: space-around; /* 项目位于各行之前、之间、之后都留有空白的容器内 */
}
.txt {
    font-size: 40px;
}
.inner-btn {
    width: 98%;
    justify-content: space-around;
    align-items: center;
    margin-top: 40px;
    margin-bottom: 40px;
}

#timeDialog .dialog-div .inner-txt {
    margin-top: 40px;
    margin-bottom: 40px;
}
